Closed stopper



FIG. 1 is a perspective view of the closed stopper;

FIG. 2 is a front view of the closed stopper;

FIG. 3 is a right side view of the closed stopper;

FIG. 4 is a left side view of the closed stopper;

FIG. 5 is a back view of the closed stopper;

FIG. 6 is a bottom view of the closed stopper; and,

FIG. 7 is a top view of the closed stopper.

The broken lines are shown for the purpose of illustrating parts of the article that form no part of the claim. 

CLAIM The ornamental design for a closed stopper, as shown and described. 